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Finding the Fourth Proportional to 74,392, 111,594.48 and 18,988

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Solution

The fourth proportional to 74,392, 111,594.48 and 18,988 is: 28,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,392 : 111,594.48 = 18,988 : x
  2. Step 2: Convert to fraction form
    74,392/111,594.48 = 18,988/x
  3. Step 3: Cross multiply
    74,392x = 111,594.48 × 18,988
  4. Step 4: Simplify right side
    74,392x = 2,118,955,986.24
  5. Step 5: Solve for x
    x = 2,118,955,986.24/74,392
  6. Step 6: Final answer
    x = 28,483.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.